If the quantity pictures 0 to 10 are known, learning the quantity pictures 11 to 20 is often easy. Hide the number display and place between 11 and 20 cherries. Show the child the screen for a moment and ask how many cherries there are. Check the answer by recounting or fading in the number display. Now it’s the child’s turn. It places a number of cherries and shows you the screen for a short moment. Name the number of cherries and check your tip together.